Cheeto Lab

Purpose:    Determine the amount of stored energy in a cheeto that can be converted into thermal energy.

Procedure:   

1.  Measure out between 100 ml to 150 ml of of water.  It really doesn’t matter how much, as long as you know the exact amount so the math works out when you plug into the equation.

2.  Convert ml to grams. (remember the density of water is 1g/ml)  D = m/v

3.  Set up the lab equipment as shown, make sure the thermometer is placed completely in the water in the can.

4.  Skewer the cheeto with an unfolded paperclip.

5.  Record the beginning temperature of your water.

6.  Carefully light the cheeto on fire and position the flame under the can.

7.  Watch until the thermometer rise to it's greatest value. (make sure the cheeto completely burns -you may have to relight the cheeto)

8.  Determine the amount of heat given off by  the cheeto.  This means, determine how much heat was received by the water.  You know the volume of your water.  Convert this to mass.  1ml = 1 g  

                                                Q = m x C x D

            m = mass of water in grams (you’ll need to convert this, look at conversion directly above)

            C = Specific heat of water (4.18)

            DT = change in temp of water in can ( you will need to figure this one out)

9. Convert your found joules found in question #8 to calories (4.18 Joule= 1 calorie)

10.  Convert your found calories to kilocalories.

11.  Multiply the kilocalories by the serving size on the bag of cheetos.  They claim a serving size is 29 cheetos, so multiple by 29.   Website: CHEETOS Puffs Cheese Flavored Snacks

12.  Repeat procedure with other food product if available.

            A cashew's serving size is:  10 full cashews or 1 oz.

            A pork rind's serving size is:  8 slices of fried pig skin or ˝ oz.